How to sync music libraries with dropbox?

Can you be more specific than just "Music Libraries?"

Correct me if i'm wrong, but Dropbox is literally a dropbox, which means there is a maximum of space you can use. You can use the settings to make Dropbox store some files on the harddrive as well, but in essence it is still a dropbox. Which means; to be able to read the files in your dropbox from another computer, the files have to be actually in the dropbox.

So syncing has nothing to do with it; you simply put the files you want to "share" IN the dropbox folder.

That's true. But you can also get around that. I'm on a mac and use MacDropAny which will make an alias of any folder in your dropbox. Do the same on your other computer and you can sync any folder anywhere on your hard drive.